Lynde, Carleton John, b. 1872 · New York, Macmillan · leaf 21
J^ Jfr^? J^orce fulcrum* ^t / fulcrum Hs^>/<?fcf orjpressure /TV/ or Pressure Lemon Squeezer fzuit Ress. FIG. 4. — Levers of the second class. press produces a weight or pressure of 4 Ib., 4 Ib., or 6 Ib., re-spectively. Levers of the third class. — The appliances shown inFig. 5 are levers of…
Physics · Home Economics
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